Electrical hammering-machine



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ELEGTRCL HAMMERING MACHINE. No. 566,537-` f aelrw, Aug., 25, 1896.

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J @fw W MM v e @@y tional viewofa portion of the machine, show- UNITED STATES I1jr-tireur Ormea.

THOMAS O. ROBINSON, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE- IIALF TO ARTHUR E. DENISON AND E. BAKER W'ELOH, OF 0^ MBRIDGE,

MASSACHUSETTS.

ELECTRICAL HAMMERlNG-NIACHKNE.

SPECIFICATION forming part of Letters Patent No. 566,537, dated August 25, 1896. Application filed March 6, 1895. Renewed January 13,. 1896. Serial No. 575,389.. (No model.)

To all whom t may concern,.-

Be it known that I, THOMAS O. ROBINSON, of Boston, in the county of Sudolk and Stat-e of Massachusetts, have invented certain new and useful Improvements in Electrical Hammering-Machines, of which the following is a specification. I

This invention relatesto portable or handcontrolled hammering-machines, and part-icularly to such machines as areoused for driv- -ing tacks for the attachment of uppers to soles of lasted boots or shoes Yin the operation of iasting. u

The invention has for its object to provide an improved means for operating the hammer ordriver offa 'tack-driving or other simiiar machine byk electricity. The invention consists in the several improvements which I will now proceed to describe and claim. Of the accompanying drawings, forming a part of this specification, Figure l represents a side elevation of my improvements embodied in a lasting-machine. Fig. 2 represents a section en the line 2 2, Fig. l. Fig. 3 represents a section on line 3 3 of Fig. l ind a plan view of the mechanism below said me. of Fig. l, looking downwardly.

Fig. `5 represents a view similar to Fig. e, showing the let-off devices in a dilierent position. Fig. G represents a section qon line 6 6 of Fig. 5. Fig. 7 represents asection on line 7 7 of Fig.

2. Fig. S represents a diagram of theelectrical connections. Fig. 9 represents a sec- "ing electromechanical means for feeding tacks to the throat of the machine. Fig. l0 represents a view showing parts of the mechanism of Fig. 9 in a diierent position. Fig

ll represents a section on line ll ll of Fig. 9:

'Figa l2 represents'a side lView showing the .lasting-'machine and its relation to the boot'or lshoe when in operation.

lThe same letters and gures of reference indicate the same parts in all the' views.

lasted v In the drawings and referringfto Figs. l to 11, inclusive, a represents a casing, prefer'- ably of cylindrical form and made of hard Fig. et represents a section on 'line 44.

rubber or other suitableinsulating material. 5o Said casing is preferably mounted or suspended from a support overhead by means of a bail a and a flexible suspension device a2.

b b represent two solenoids, which are arrangedend to end within the casing and suitably attached thereto, the longitudinal cavities in the solenoids being in line with each other, so that they constitute a continuous tubular passage, in which vthe core or armature c is adapted to move endwise. The two 6o solenoids are included in a branched electric circuit, one branch of which includes the solenoid b and the other the solenoid h', the connections being as shown in the diagram in Fig. 8, in which l 2 represent the main wires 6 5 of the circuit, while 3 andA i represent the wires which, with the solenoid o, constitute one branch of the circuit, the wires 5 and 6 constituting, with the solenoid b', the other branch of the circuit. y 7o d represents a switch which is adapted to close the circuit through either branch and break the circuit through the other, said switch being mounted to turn upon a suitable support or bearin g connected with the casing a 7 5 and cooperating with contact-springs and 8. When the switch is in the position shown in full linesin Fig. 8, it connects the parts l and l 2 of the circuit through the solenoid b and breaks the circuit through the solenoid b. 8o When the switch is turned to the reverse position, it closes the circuit through the solenoid b and breaks the circuit through the solenoid Z2. It will be seen, therefore, that by manip ulating the switch the operator is enabled to 85 energize each solenoid alternately, the other being at the same time demagnetized, so that by energizing the solenoid b the core or plunger c will be raised or retracted, while by en'- ergizing the solenoid b' the core will be pro- 9o jected. To the core c is attached a driver e, Fig. 2, which when the core is projectedv or depressed, as above described, is forced into amok-delivering throat or nozzle f, aiiixed to the casing a. in line with the core e, said driver being adted when thus projected to' drive a tack supplied to the said throat, by

means hereinafte rdescribed, intothe upper"v and solo ofl a lasted boot or shoe g, Which may be supported by a suitable jack or otherwiseheld for the action of the machine.

For the convenient operation of the sivitch d l have provided an arm or handle d,"which is pivotally connected at (Z2 to a stud cl3, affixed to the machine, and a link d4, connecting said handle Withan arm d5, formed on the switch. The handle d is arranged to be conveniently moved by the hand of the operator, and when it is moved in the direction indicated by the arrow in Fig. 3 it moves the switch from the position shown in full lines in Fig. 8 to that shown in dotted lines, thus causing the projection or descent of the driver. When the handle d iereleased, a springdl, connected with a fixed support on the machineand with the arm d", restores the switch to the position shown in full lines in Fig. 8, this being the normal p'osition of the switch, so that the upper solenoid 'b is nor mally in circuit, and the solenoid b is normally demagnetized,

h represents an electromagnet or helix which is located in close proximity to the tack-delivering throat f and has a fixed core h', which is bent laterally toward the throat f, its outer end'standing in such proximity to the tack-passage in said throat that when the electromagnet h is energized the core h' will attract thewtaek. vwhich-nia Y bel passing through said throat and hold the tack, as shown in Fig. 7, in position to be forced out by the driver. The electromagnet h is ineluded in the branch of the circuit that inclndes the solenoid b, and is shown in Fig. 8

as connected at one end with the Wire 4 and at the other end by a Wire 4r with the contactspring 7, the electroinagnet h and wire -i being therefore a part of the branch of the circuit that includes the solenoid b. The electromagnet 7L is therefore normally energized, so that whenever the driver is raised and a tack is delivered to the throat f said tack is detained by the core 7L until the solenoid b is deniagnetized and'the solenoid b inagnetized to cause the projection of the driver, the core h' being deinagnetized with the solenoid b, so that it releases the tack just as the driver descends.

represents a tackreservoir secured to a suitable part of the machine, preferably the throat f, said reservoir communicating with a tackfchute t", adapted to conduct tacks to the lower portion of the throat, where a slot f is provided to permit the entrance of the tacks oneat a time to the throat, said slot being located so that each tack delivered by the chute to the throat comes within the eld of force of the core h' and is attracted by the latter. A suitable let-off device is employed for admitting one tack at a time to the throat f, said let-oli device, as shown'in Figs. 2, ai, and 5, comprising an arm or stud j, aiiixed to the switch-operating handle d, and two gates or spurs j j?, which are arranged to be moved by the abovedescribed switcl1-ope1ating movements of the handle d Aing thus caused to release the lower tack in the column and permit 'it to enter the throat While the spur .j' engages the next tack, so that not more than one tack can escape at a time. Then the handle h is moved bythe action of the spring d6 to restore the switch to its norma-l position, the spurs j' j? assume the position shown in Fig. 4, the spur 7"2 arresting the column of tacks, thismovement of the spurs taking place without releasing a tack into the throat f.

In Fig. 1l I show the let-o device as an armf, formed on asleevejS, which is fitted to turn on the throat j'. Said arm is connected by a rod je With'the switch-operating lever d. Thearin j* may have any suitable projections, such as .the spurs j jz, to act on the tacks.

k k represent jaws constituting a pair of pincers, the jaw 7c being affixed to a frame or holder k2, which is suitably secured to the th `oat f, while the jaw 7e is pivoted at k3 to th jaw k. Said jaws are provided with operating-handles 194.255, by which they .maybe closed. The handles are preferably arranged as shown in Figs. l and 9, vwhere they are shown as occupying such position relatively to the switch-operating handle d "aat the operator can manipulate both th pincers and the switch with the same ham the pincers being used'to grasp the uppe;l ad draw it to place upon the sole before th switch is operated to project the driver. prefer to make the throat j', 1 .e pincer-jaws t: lt', and

the frame or holder k2, which connects saidv jaws to the throat, of brass or aluminium or some other non-magnetic metal in order that there may be no interference by magnetism with the tacks.

In Figs. `9, 10, and 1l I show electromechanical means for feeding tacks to the throat f, said means comprising an electromagnet t, affixed to a rock-shaft u, which is journaled in the tack-reservoir, and a rod yw, connecting IOC IIO

an arm a on the shaft u with the handle if? v ol thc movable jaw of the pincers. The electroinagnet is connected in the branch of the circuit that includes the solenoid b, and is therefore energized with said solenoid. The core t of the magnet t projects downwardly into the mass of tacks and attracts several tacks when the magnet is energized. When the operator moves the handle ,lo5 to close the vpincers, the magnet tis swung over the upper end of the chute L" and holds the attracted tacks in position to drop into said chute, as shown in Fig. 10. When the switch is operated to energize the solenoid b and demag-4 netize the solenoid l), the magnet t is demagnetized and drops the tacks, which are thus supplied tothe chute.l lVhen thc handle k 40. tack-delivering throat, a tack-chute commuthroat, an electric motor organized to project I and retract theydriver, a .motor-controlling is released the magnet t swings down into the tacks and is again magnetized by the return of the switch to its normal position.

The solenoids, the core, and the electrical connections constitute an electric motor which alternately projects and rctracts the driver or hammer, the ,whole being supported in a suitable casing or carrier, and constituting a light, simple, and effective apparatus, adapted to be easily guided and controlled by the operator. I do not limit myself, however, to the employment of the particular description of electric motor here shown, and may employ any other suitable electrical means for projecting and releasing the hammer.

I claim- 2 l. A tack-driving machine comprising a casing or holder, a tack-delivering throat atV one end of said casing, means supported bythe casing for delivering tacks to the throat, a driver movable in said throat, an electric motor within theV casing organized to project and retract the driver, a motor-controlling switch, and electrical connections between said switch and motor whereby the motor is caused to proj ectand retract the driver.

2. 4A tack-driving machine comprising a tack-delivering throat, means for supplying tacks thereto, a driver movable in said throat, an electric motor organized to project and retract the driver, a motor-controlling switch, electrical connections between said switch and the motor whereby the motor is caused to project or retract the driver according` to the position of the switch, means for yieldingly holding the switch in position to cause the retraction of thedriver by the motor, and an operating device for moving the switch from said position.

3. A tack-driving machine comprising a nicating therewith, a driver movable in said and retract the driver, a motori-controlling switch, electrical connections between said switch and the motor whereby the motor is caused to project or retract the driver accordingt ,the position of the switch, an operating device for moving the switch from one position to another, and a taclclet-od device coiinected with said operating device and actnated thereby to supply a tack to the throat when the position of the switch is changed to cause the retraction of the driver.

4. A tack-driving machine comprising a tack-delivering throat, a tack-chute communicating therewith, a driver movable in said throat, an electric motor organized to project switch, electrical connections between said switch and the motor whereby the motor is caused to project or retract the driver according to the position of "the switch, an operating device for moving the switch from one position to another, a tack-let-oi device connected with said operating device and actua ed thereby to supplya tack to the throat both solcnoids, a reciprocatingzdriver carried p by said core, means for energizing the solenoids alternately and thereby alternately projecting and retracting the core and driver, said means including a switch and an operating device therefor carried by the holder, a tack-delivering nozzle or throat in line with the driver, means for delivering tacks to said throat, an electromagnet arranged to arrest a tack inthe throat for the action of the driver, and connections 4 between said electromagnet and the .driver-raising solenoid whereby the magnet isl energized when the driver is raised and demagnetized when the driver descends. v

6. A tack-driving machine comprising a vcasing or carrier, a reciprocating driver, an

electric motor adapted to project and retract the driver, a tack-delivering throat or nozzle, a tack-reservoir havinga raceway entering said throat, a pair of pincers comprising a' pivoted jaw and a fixed jaw, a switch and electrical connections cooperating therewith whereby the motor may be controlled, and a switch-operating device arranged in suitable vrelation to the pincers to be manipulatedA by the operator.

7. A tack-driving machine comprising acasing or carrier, a reciprocating driver, 4an electric motor adapted to project and retract the driver, a motor-controlling switch, a tackdelivering throat aiXed to the holder in the path of the driver, means for supplying tacks to said throat, a holder attached to said throat,

and pincer-jaws supported by said holder: the said holder being of non-magnetic material, as set forth. v

8. A tack-drivin g machine comprising a casing 'or carrier, a reciprocating driver, an electric motor adapted to project and retract thedrivcr, a motor-controlling switch, a tackdelivering throat affixed to the casing in the path of the driver, a tack-reservoir, a raceway extending from said reservoir to the throat, an electromagnet mounted to move in the tack-reservoir and electrically connected with IOC IIO

the motor so that it is alternately energized and domagnetized, and means for moving said magnet to cause it to stand alternately over the raceway and in or overthe mass of tacks in the reservoir.

9. A tack-driving machine comprising a casing lor carrier, a reciprocating driver, an electric motor adapted to project and retract the driver, a motor-controlling switchzataekdelivering throat ai'lixed to the holder the path of the driver, a tack-reservoir; a raceway extending from said reservoir'to the throat, pincer-jaws supported by the frame of the machine, one of said jaws being movable rela# tively to the other, an electromagnet mounted to move in the tack-reservoir and electrically connected with the motor, and a mechanical connection between saidmagnet and the movable jaw, whereby the magn'etma'y be caused to stand alternately over the tacks lin the reservoir and over the raceway'.

10. A tack-driving machine comprising a tack-guiding throat, a tack-reservoir, a chute connectingr the reservoir with the throat, a movable electromagnetic tack-supplying de* vice in the reservoir, means for moving-` said device, a mechanical tackleto device in the chute, a driver movable in the throat, an

electrlic motor organized to proj ect-and retract the driver, a motor-controlling switch, electrical connections between the switch, the motor, and the tack-supplying device Whereby the motor is caused to project or retract the driver and the tacksupplying device is energized or demagnetized according to the position of the switch, and a mechanical operating device connected both with the switch and with the let-olf device,whe1'eby the switch and let-olf device may b'e simultaneously operated.`

.In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, this 27th day of February, A. D. 1895.

THCMAS C. ROBINSON.

Vi tnesses: 'f

C. F. BROWN, E. BATCHELDER. 

